CVE-2026-36189

Buffer Overflow vulnerability in Uncrustify Project Affected v.Uncrustify_d-0.82.0-132-bcc41cbdc and Fixed in commit 68e67b9a1435a1bb173b106fedb4a4f510972bdc allows a local attacker to cause a denial of service via the check_template.cpp, check_template function, tokenize_cleanup function, uncrustify executable components

Published: 2026-05-21 Last update: 2026-05-21 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-36189 is rated Low Risk (26.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.14%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-36189

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.14% +0.12%
2 2026-05-22 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-36189

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.2 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.5 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-36189

GitHub Security Advisory for CVE-2026-36189

GHSA-c5x6-jm2x-6vfp · Severity: medium — Buffer Overflow vulnerability in Uncrustify Project Affected v.Uncrustify_d-0.82.0-132-bcc41cbdc...

OS Trackers for CVE-2026-36189

vendor priority summary link
ubuntu medium CVE-2026-36189 medium priority: Ubuntu including 1 source packages (uncrustify), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, resolute, upstream): needs-triage 7. https://ubuntu.com/security/CVE-2026-36189

Affected software / configurations for CVE-2026-36189

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-36189

cvelogic Threat Intelligence